As far as the amp the 4bsst is great but dry sounding. I had the B100sst when I had the C1's and as good as it was the Octave V70se and later the V110 had more 'control' of the sound and not as dry sounding. Naim Supernait2 is also excellent. A friend is using the SN2 w/HiCap driving Dyn C4 Signatures and that works just fine. Very musical.
Good Luck
Good Luck